Yogo; Tetsuji

Patent Applications and Registrations

Patent applications and USPTO patent grants for Yogo; Tetsuji.The latest application filed is for "high-purity alumina sintered body, high-purity alumina ball, jig for semiconductor, insulator, ball bearing, check valve, and method for manufacturing high-purity alumina sintered body".

Company Profile

0.7.10

Yogo; Tetsuji - Aichi JP
Yogo; Tetsuji - Nagoya JP
Yogo, Tetsuji - Nagoya-shi JP
Yogo; Tetsuji - Aichi-ken JP

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic dynamic-pressure bearing Grant 6,702,466 - Ishikawa , et al. March 9, 2	2004-03-09
Zirconia containing ceramic ball, method for manufacturing same, ceramic ball bearing and check valve Grant 6,696,376 - Niwa , et al. February 24, 2	2004-02-24
Ceramic dynamic pressure bearing, motor with bearing, hard disk device, and polygon scanner Grant 6,659,647 - Sugiyama , et al. December 9, 2	2003-12-09
Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, and polygon scanner Grant 6,619,847 - Ishikawa , et al. September 16, 2	2003-09-16
Ceramic dynamic pressure bearing, motor with bearing, hard disc apparatus and polygon scanner Grant 6,619,848 - Ishikawa , et al. September 16, 2	2003-09-16
High-purity alumina sintered body, high-purity alumina ball, jig for semiconductor, insulator, ball bearing, check valve, and method for manufacturing high-purity alumina sintered body App 20030008765 - Niwa, Tomonori ; et al.	2003-01-09
Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic dynamic-pressure bearing App 20020186903 - Ishikawa, Hironobu ; et al.	2002-12-12
Ceramic dynamic pressure bearing, motor with bearing, hard disc apparatus and polygon scanner App 20020159659 - Ishikawa, Hironobu ; et al.	2002-10-31
Ceramic dynamic pressure bearing, motor with bearing, hard disk device, and polygon scanner App 20020154840 - Sugiyama, Atsutoshi ; et al.	2002-10-24
Conductive ceramic bearing ball, ball bearing, motor having bearing, hard disk drive, and polygon scanner App 20020044705 - Niwa, Tomonori ; et al.	2002-04-18
Ceramic ball, ball bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic ball App 20020039459 - Niwa, Tomonori ; et al.	2002-04-04
Silicon nitride sintered body, silicon nitride ball, silicon nitride bearing ball, ball bearing, motor having bearing, hard disk drive, and polygon scanner App 20020037803 - Niwa, Tomonori ; et al.	2002-03-28
Ceramic ball for bearing and ceramic ball bearing using the same App 20020003228 - Niwa, Tomonori ; et al.	2002-01-10
High-purity alumina sintered body, high-purity alumina ball, jig for semiconductor, insulator, ball bearing, check value, and method for manufacturing high-purity alumina sintered body App 20010054443 - Niwa, Tomonori ; et al.	2001-12-27
Zirconia containing ceramic ball, method for manufacturing same, ceramic ball bearing and check valve App 20010039237 - Niwa, Tomonori ; et al.	2001-11-08
Sintered ceramic bodies and ceramic working tools Grant 5,994,250 - Suzuki , et al. November 30, 1	1999-11-30
Method of producing ceramic rotor Grant 5,106,550 - Yogo , et al. April 21, 1	1992-04-21

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